<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar fixed
                 left-arrow
                 @click-left="$router.back()"
                 title="文章详情"></van-nav-bar>
    <!-- 文章详情 -->
    <div class="loading"
         v-if="loading">
      <van-loading class="inner"
                   type="spinner"
                   color="#1989fa" />
    </div>
    <div class="detail"
         v-else>
      <h3 class="title">{{article.title}}</h3>
      <div class="author">
        <van-image round
                   width="1rem"
                   height="1rem"
                   fit="cover"
                   :src="article.aut_photo" />
        <div class="text">
          <p class="name">{{article.aut_name}}</p>
          <p class="time">{{article.pubdate | date}}</p>
        </div>
        <van-button round
                    size="small"
                    type="info"
                    @click="follow">{{article.is_followed ? '取关':'+关注'}}</van-button>
      </div>
      <div class="content">
        <div v-html="article.content"></div>
      </div>

      <van-divider>END</van-divider>

      <div class="zan">
        <van-button round
                    size="small"
                    hairline
                    type="primary"
                    plain
                    :icon="article.attitude === 1 ? 'good-job':'good-job-o'"
                    @click="like">
          {{article.attitude === 1 ? '取消':'点赞'}}
        </van-button>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <van-button round
                    size="small"
                    hairline
                    type="danger"
                    plain
                    icon="delete"
                    @click="dislike">
          {{article.attitude === 0 ? '取消' : '不喜欢'}}
        </van-button>
      </div>
    </div>
    <!-- /文章详情 -->
    <Comment></Comment>
  </div>
</template>

<script>
import { followUser, unfollowUse } from '@/api/user'
import { getArticleDetail, deleteLike, addLike, deleteDisLike, addDisLike } from '@/api/article'
import { mapState } from 'vuex'
import Comment from './comment'
export default {
  components: {
    Comment
  },
  name: 'Article',
  computed: {
    id() {
      return this.$route.params.id
    },
    ...mapState('user', ['token'])

  },
  data() {
    return {
      article: {},
      loading: false
    }
  },
  // 发请求渲染
  async created() {
    const res = await getArticleDetail(this.id)
    // console.log(res)
    this.article = res.data
    this.loading = false
  },
  methods: {
    // 关注
    async follow() {
      if (!this.token.token) {
        // 没有登录
        this.$router.push({
          path: '/login',
          query: {
            back: this.$route.path
          }
        })
        this.$toast('请先登录')
        return
      }
      if (this.article.is_followed) {
        // 发请求取消关注
        await unfollowUse(this.article.aut_id)
      } else {
        // 获取关注
        await followUser(this.article.aut_id)
      }
      // 提示
      this.$toast.success('操作成功')
      // 重新渲染
      this.article.is_followed = !this.article.is_followed
    },
    // 喜欢 点击
    async like() {
      if (!this.token.token) {
        // 没有登录
        this.$router.push({
          path: '/login',
          query: {
            goBack: true
          }
        })
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 1) {
        // 发送请求取消关注
        await deleteLike(this.id)
      } else {
        // 发送请求关注
        await addLike(this.id)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 1 ? -1 : 1
    },
    // 不喜欢点击
    async dislike() {
      if (!this.token.token) {
        // 没有登录
        this.$router.push({
          path: '/login',
          query: {
            goBack: true
          }
        })
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 0) {
        // 发送请求取消关注
        await deleteDisLike(this.id)
      } else {
        // 发送请求关注
        await addDisLike(this.id)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 0 ? -1 : 0
    }
  }

}
</script>

<style lang='less' scoped>
.loading {
  height: 100vh;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-container {
  position: absolute;
  left: 0;
  top: 0;
  overflow-y: scroll;
  width: 100%;
  height: 100%;
}
.article-loading {
  padding-top: 100px;
  text-align: center;
}
.error {
  padding-top: 100px;
  text-align: center;
}
.detail {
  padding: 50px 10px;
  .title {
    font-size: 16px;
  }
  .zan {
    text-align: center;
  }
  .author {
    padding: 10px 0;
    display: flex;
    .text {
      flex: 1;
      padding-left: 10px;
      line-height: 1.3;
      .name {
        font-size: 14px;
        margin: 0;
      }
      .time {
        margin: 0;
        font-size: 12px;
        color: #999;
      }
    }
  }
  .content {
    font-size: 14px;
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-all;
    ::v-deep img {
      max-width: 100%;
      background: #f9f9f9;
    }
  }
}
</style>
